Lifting jack



Patented ug. 19, 1924.

UNITED STATES PATENT" olor..

.ROBERT F. WOOD AND WILLIAM I-I. MC'GARTHY, 0F MAIIANOY PLANE, PENNSYLVANIA.

LIFTING JACK.v

To all who/m. it 'may concern.'

Be it known that we, ROBERT F. WOOD and WILLIAM H. MCCARTHY, citizens of the United States, residing at Mahanoy Plane, in the county of Schuylkill and State of Pennsylvania, have invented certain new and useful Improvements in Lifting Jacks, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates to certain improvements in lifting jacks and has relation more particularly to a foot adapted to be associated therewith, said foot comprising novel and improved means whereby the line 0f action of the jack may be readily changed and which foot is constructed in a manner adapting it for use in connection With jacks now generally employed.

The invention consists in the details of construction and in the combination and arrangement of the several parts of our improved lifting jack whereby certain important advantages are attained and the device rendered simpler, less expensive and otherwise more convenient and advantageous for use, as will be hereinafter more fully set forth.

The novel features of our invention will hereinafter be definitely claimed.

In order that our invention may be the better understood, we will now proceed to describe the same with reference to the accompanying drawings, wherein Figure 1 is a view in side elevation illustrating a foot for a jack constructed in accordance with an embodiment of our invention and in applied position, a second posi-- tion of the jack with respect to the foot being diagrammatically indicated by broken lines;

Figure 2 is an end elevational view of the foot as herein disclosed unapplied; and

Figure 3 is a view in top plan of the de vice as illustrated in Figure 2.

As disclosed in the accompanying drawings, A denotes a lifting jack of a conventional type for use in connection with rail.- road trackways and which is provided in its lower portion with an opening to provide a socket l for a purpose to be hereinafter more particularly referred to.

Serial No. 662,846.

Our improved foot comprises an elongated plate 2 relatively broad, and which has one end portion disposed on a predetermined l of the pin 4 between the ears or wings 3 is pivotally connected therewith through the instrumentality of the pintle 5 whereby the plate 2 and the pin 4 are connected for rela` tive swinging movement in a direction l lengthwise of the plate 2.

The pin 4 is of a length to be inserted within the socket 1 hereinbefore referred to of the jack A, the extent of insertion of the pin 4 being limited by the annular flange or collar 6 carried by the pin 4 at a predetermined point inwardly of its outer end.

With the use of our improved foot the line of action of the jack A may be readily and conveniently changed as required, whereby the jack is particularly adapted for use in the lining of the rails of a trackway. Furthermore it is to be noted that our improved foot is of a character to permit its use in connection with jacks of a type now generally employed.

From the foregoing description it is thought to be obvious that a lifting jack constructed in accordance with our invention is particularly well adapted for use by reason of the convenience and facility with which it may be assembled and operated, and it will also be obvious that our invention is susceptible of some change and modification without departing from the princi` ples and spirit thereof and for this reason we do not wish to be understood as limiting ourselves to the precise arrangement and formation of the several parts herein shown in carrying out our invention in practice except as hereinafter claimed.

We claim In combination with a jack provided with a socket in its lower end, a foot, an elongated plate having one end portion disposed on a curvature in a direction away from the jack when the foot and jack are assembled, a pair of transversely spaced ears carried by the plate inwardly of but in close proxwith an outstanding ange to limit the inimity to the curved portion thereof, a pin Sertion of the jack.

having one end portion extending between In testimony whereof we hereunto afx l0 the ears and pivotally engaged therewith, our signatures. i; said pinbeing-insertible within the socket'y in the lower end portion of theejaok, said ROBERT F. WQD. pin intermediate its ends being provided WILLIAM H. MoCARTHY. 

